Head-mounted display device



FIG. 1 is a front, left side, top perspective view of a head-mounted display device showing our new design;

FIG. 2 is a rear, right side, bottom perspective view thereof;

FIG. 3 is a front, right side, bottom perspective view thereof;

FIG. 4 is a rear, left side, top perspective view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof;

FIG. 9 is a top view thereof;

FIG. 10 is a bottom view thereof; and,

FIG. 11 is an exploded right side view thereof. 

CLAIM The ornamental design for a head-mounted display device, as shown. 